Beside the operational nightmare that it would be to deploy with such a strategy, it wouldn't work long term. JITed code can be invalidated and recompiled, so

Beside the operational nightmare that it would be to deploy with such a strategy, it wouldn't work long term. JITed code can be invalidated and recompiled, so your forks would still drift over time. I'm a big proponent of unicorn (and forking setups in general) for various operational reasons, but I think JIT might be the last nail in the coffin.